* {
    margin: 0px;/*设置四周边距都为0*/
    box-sizing: border-box;/*宽高的设置值包括border等*/
}

body {
    background: url("41.jpg");
    background-repeat: no-repeat;
    background-attachment: fixed;/*设置背景图不随网页滑动而改变*/
    background-size:cover;  
  }
  
  .search-container {
    width: 300px;
    margin: 50px auto;
    opacity: 2;
  }
  
   .title {
    text-align: center;
  }

  .search-input {
    width: 100%;
    padding: 10px;
    border: none;
    border-radius: 5px;
    background-color: transparent;
    color: #1f3778;
    font-size: 16px;
    outline: none;
  }
  
  .search-btn {
    display: block;
    width: 100%;
    height: 50px;
    background-color: #333;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
  }